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Recent Accounting Pronouncements and Changes to Accounting Policies - Summary of Measurement Category of Financial Assets (Detail) - Increase (decrease) due to application of IFRS 9 [member] | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Cash and cash deposits and cash in escrow [member] | Financial assets at amortised cost, category [member] |  |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |  |
Financial assets measurement, after | Amortized cost |
Cash and cash deposits and cash in escrow [member] | Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently, category [member] |  |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |  |
Financial assets measurement, before |  | FVPL
Receivables and other current financial assets [member] | Financial assets at amortised cost, category [member] |  |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |  |
Financial assets measurement, after | Amortized cost |
Financial assets measurement, before |  | Amortized cost
Equity securities [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] |  |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |  |
Financial assets measurement, after | Mandatorily at FVPL |
Equity securities [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] |  |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |  |
Financial assets measurement, before |  | FVOCI
Bonds [member] | Financial assets measured at fair value through other comprehensive income, category [member] |  |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |  |
Financial assets measurement, after | FVOCI |
Financial assets measurement, before |  | FVOCI
Holdbacks on long-term contracts [member] | Financial assets at amortised cost, category [member] |  |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |  |
Financial assets measurement, after | Amortized cost |
Financial assets measurement, before |  | Amortized cost
Indemnifications [member] | Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently, category [member] |  |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |  |
Financial assets measurement, after | FVPL |
Financial assets measurement, before |  | FVPL
Other financial asset [member] | Financial assets at amortised cost, category [member] |  |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |  |
Financial assets measurement, after | Amortized cost |
Financial assets measurement, before |  | Amortized cost

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The measurement category of financial assets immediately after the initial application of IFRS 9. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 42I -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_42I_b&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The measurement category of financial assets at the date of initial application of IFRS 9, determined in accordance with IAS 39 or in accordance with a previous version of IFRS 9 (if the entity’s chosen approach to applying IFRS 9 involves more than one date of initial application for different requirements). [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 42I -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_42I_a&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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- Details
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